• Engine

    Model Komatsu SAA6D140E-7
    Type Four-cycle, water-cooled, direct injection
    Aspiration Turbo-charged, after-cooled, cooled EGR
    Number of cylinders 6
    Bore x stroke 140 mm x 165 mm
    Displacement 15.24 ltr
    Horsepower, Gross - SAE J1995 353 kW / 473 HP
    Horsepower, Net - ISO 9249 / SAE J1349 348 kW / 466 HP
    Rated RPM 2000
    Fan drive method Hydraulic
    Emissions certification EPA Tier 4 Final
  • Axles

    Full time all wheel drive with Komatsu Traction Control System (K-TCS)

    Final drive type Planetary gear
    Differential 3.727
    Planetary 4.941
  • Body

    Capacity, struck 18.2 m3
    Capacity, heaped (2:1 SAE) 24 m3
    Payload 40000 kg
    Target area (inside length x width) 5667 mm x 3194 mm
    Heating Exhaust heating (option)
    Material 130 kg/mm2 high tensile strength steel
    Material thickness:
    Bottom 16 mm
    Front 8 mm
    Sides 12 mm
  • Brakes

    Service brakes Full-hydraulic control, oil-cooled multiple-disc type on front and centre axles
    Standard ISO3450
    Parking brake Spring applied, caliper disc type
    Retarder Front and centre axle brakes act as retarder
  • Cab


    ISO3449 (FOPS)

    ISO3471 (ROPS)

  • Hydraulic System

    Hoist cylinder Twin, telescopic type
    Relief pressure

    28.4 MPa

    290 kg/cm2

    Hoist time 12.0 sec
  • Main Frame


    Articulated, box-sectioned construction on front and rear

    Connected by strong torque tubes

  • Service Refill Capacities

    Fuel tank 525 ltr
    DEF tank 34.0 ltr
    Engine oil 50 ltr
    Torque converter, transmission and retarder cooling 125 ltr
    Differentials (total) 108 ltr
    Final drives (total) 32 ltr
    Hydraulic system 167 ltr
    Suspension (total) 21.4 ltr
  • Steering System

    Type Articulated type, fully hydraulic power steering with two double-acting cylinders
    Supplementary steering Automatically actuated, electrically powered


    SAE J1511

    Minimum turning radius, wall to wall 8.8 m
    Articulation angle 45° each direction
  • Suspension System

    Front Hydro-pneumatic suspension
    Rear Combined hydro-pneumatic and rubber suspension system
  • Transmission

    Torque converter 3-elements, 1-stage, 2-phase
    Transmission Full-automatic, countershaft type
    Speed range 6 speeds forward and 2 reverse
    Lockup clutch Wet, single-disc clutch
    Forward Torque converter drive in 1st gear, direct drive in 1st lockup and all higher gears
    Reverse Torque converter drive and direct drive in all gear
    Shift control Electronic shift control with automatic clutch modulation in all gear
    Maximum travel speed 55.9 km/h
  • Tyres

    Standard tyre 29.5 R25
  • Weight (Approximate)

    Empty and Gross Weight:

    Empty weight 35005 kg
    Gross vehicle weight 75135 kg



    Weight Distribution:

    Front axle 56.9%
    Centre axle 23.6%
    Rear axle 19.5%
    Front axle 30.4%
    Centre axle 35.8%
    Rear axle 33.8%

HM400-5 Dump Trucks

The HM400-5 is a 40-tonne capacity truck, powered by a new technology Komatsu engine and featuring our advanced truck transmission system, along with exclusive hydraulic braking and restarder systems for unrivalled traction, braking power and safety in all applications. As with all our trucks, key components are designed and manufactured by Komatsu to work together in an integrated package. And it comes standard with our KOMTRAX remote monitoring and location system, backed by our Australia-wide service and support network.

  • 348 kW / 466 HP
  • 75,135 kg
  • 40,000 kg


Komatsu Traction Control System

Komatsu Traction Control System (KTCS) automatically engages the inter axle lock and the KTCS braking to provide optimal traction in soft ground conditions

Selectable Economy and Power Working Modes

Selectable working modes for Economy and Power allows machine performance to be optimised based on demand and operating conditions

Auto Idle Shutdown

In order to reduce unwanted idle time, Komatsu machines feature Komatsu Auto Idle Shutdown. This function will shut the engine off and apply the parking brake and hydraulic lock after a preset idle time limit

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